參數(shù)資料
型號(hào): EP9307-IR
廠(chǎng)商: Cirrus Logic Inc
文件頁(yè)數(shù): 7/16頁(yè)
文件大?。?/td> 0K
描述: IC ARM920T MCU 200MHZ 272-TFBGA
標(biāo)準(zhǔn)包裝: 119
系列: EP9
核心處理器: ARM9
芯體尺寸: 16/32-位
速度: 200MHz
連通性: EBI/EMI,以太網(wǎng),I²C,IrDA,鍵盤(pán)/觸摸屏,SPI,UART/USART,USB
外圍設(shè)備: AC'97,DMA,I²S,LCD,LED,MaverickKey,POR,PWM,WDT
輸入/輸出數(shù): 14
程序存儲(chǔ)器類(lèi)型: ROMless
RAM 容量: 32K x 8
電壓 - 電源 (Vcc/Vdd): 1.65 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x12b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 272-TFBGA
包裝: 托盤(pán)
配用: 598-1133-ND - KIT DEVELOPMENT EP9307 ARM9
其它名稱(chēng): 598-1255
ER667E2B
15
Description 12
When an operand to the Crunch add/subtract unit is denormalized, it is forced to zero before input to the
calculation. The sign is unaffected. This affects the following instructions:
- Copies:
cfcpys, cfcpyd
- Add/Sub:
cfadds, cfaddd, cfsubs, cfsubd
- Absolute value: cfabss, cfabsd
- Negation:
cfnegs, cfnegd
- Conversions:
cfcvtsd, cfcvtds
When the operand is negative zero, cfcpys and cfcpyd write positive zero to the destination register, while
the result should be negative zero.
When the operand is positive zero, cfnegs and cfnegd write positive zero to the destination register, while
the result should be negative zero.
Workaround
None.
Description 13
The operation cfcvtds, which converts a double floating point value to a single floating point value, never
produces a denormalized result, even if the value can be accurately represented as such. The result
underflows directly to zero. Sign is preserved properly, however.
Workaround
None.
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